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bloblist: Add a command

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It is helpful to be able to see basic statistics about the bloblist and
also to list its contents. Add a 'bloblist' command to handle this.

Put the display functions in the bloblist modules rather than in the
command code itself. That allows showing a list from SPL, where commands
are not available.

Also make bloblist_first/next_blob() static as they are not used outside
this file.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2020-09-19 18:49:26 -06:00
parent 9c22adb8f9
commit 4aed227623
6 changed files with 196 additions and 4 deletions
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9
cmd/Kconfig
View file

@ -631,6 +631,15 @@ config CMD_BINOP
Compute binary operations (xor, or, and) of byte arrays of arbitrary
size from memory and store the result in memory or the environment.
config CMD_BLOBLIST
bool "bloblist"
default y if BLOBLIST
help
Show information about the bloblist, a collection of binary blobs
held in memory that persist between SPL and U-Boot. In the case of
x86 devices the bloblist can be used to hold ACPI tables so that they
remain available in memory.
config CMD_CRC32
bool "crc32"
default y

1
cmd/Makefile
View file

@ -24,6 +24,7 @@ obj-$(CONFIG_CMD_BDI) += bdinfo.o
obj-$(CONFIG_CMD_BEDBUG) += bedbug.o
obj-$(CONFIG_CMD_BIND) += bind.o
obj-$(CONFIG_CMD_BINOP) += binop.o
obj-$(CONFIG_CMD_BLOBLIST) += bloblist.o
obj-$(CONFIG_CMD_BLOCK_CACHE) += blkcache.o
obj-$(CONFIG_CMD_BMP) += bmp.o
obj-$(CONFIG_CMD_BOOTCOUNT) += bootcount.o

37
cmd/bloblist.c Normal file
View file

@ -0,0 +1,37 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Command-line access to bloblist features
*
* Copyright 2020 Google LLC
* Written by Simon Glass <sjg@chromium.org>
*/
#include <common.h>
#include <bloblist.h>
#include <command.h>
DECLARE_GLOBAL_DATA_PTR;
static int do_bloblist_info(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
bloblist_show_stats();
return 0;
}
static int do_bloblist_list(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
bloblist_show_list();
return 0;
}
static char bloblist_help_text[] =
"info - show information about the bloblist\n"
"bloblist list - list blobs in the bloblist";
U_BOOT_CMD_WITH_SUBCMDS(bloblist, "Bloblists", bloblist_help_text,
U_BOOT_SUBCMD_MKENT(info, 1, 1, do_bloblist_info),
U_BOOT_SUBCMD_MKENT(list, 1, 1, do_bloblist_list));

62
common/bloblist.c
View file

@ -13,15 +13,31 @@
DECLARE_GLOBAL_DATA_PTR;
struct bloblist_rec *bloblist_first_blob(struct bloblist_hdr *hdr)
static const char *const tag_name[] = {
[BLOBLISTT_NONE] = "(none)",
[BLOBLISTT_EC_HOSTEVENT] = "EC host event",
[BLOBLISTT_SPL_HANDOFF] = "SPL hand-off",
[BLOBLISTT_VBOOT_CTX] = "Chrome OS vboot context",
[BLOBLISTT_VBOOT_HANDOFF] = "Chrome OS vboot hand-off",
};
const char *bloblist_tag_name(enum bloblist_tag_t tag)
{
if (tag < 0 || tag >= BLOBLISTT_COUNT)
return "invalid";
return tag_name[tag];
}
static struct bloblist_rec *bloblist_first_blob(struct bloblist_hdr *hdr)
{
if (hdr->alloced <= hdr->hdr_size)
return NULL;
return (struct bloblist_rec *)((void *)hdr + hdr->hdr_size);
}
struct bloblist_rec *bloblist_next_blob(struct bloblist_hdr *hdr,
struct bloblist_rec *rec)
static struct bloblist_rec *bloblist_next_blob(struct bloblist_hdr *hdr,
struct bloblist_rec *rec)
{
ulong offset;
@ -233,6 +249,46 @@ int bloblist_finish(void)
return 0;
}
void bloblist_get_stats(ulong *basep, ulong *sizep, ulong *allocedp)
{
struct bloblist_hdr *hdr = gd->bloblist;
*basep = map_to_sysmem(gd->bloblist);
*sizep = hdr->size;
*allocedp = hdr->alloced;
}
static void show_value(const char *prompt, ulong value)
{
printf("%s:%*s %-5lx ", prompt, 8 - (int)strlen(prompt), "", value);
print_size(value, "\n");
}
void bloblist_show_stats(void)
{
ulong base, size, alloced;
bloblist_get_stats(&base, &size, &alloced);
printf("base: %lx\n", base);
show_value("size", size);
show_value("alloced", alloced);
show_value("free", size - alloced);
}
void bloblist_show_list(void)
{
struct bloblist_hdr *hdr = gd->bloblist;
struct bloblist_rec *rec;
printf("%-8s %8s Tag Name\n", "Address", "Size");
for (rec = bloblist_first_blob(hdr); rec;
rec = bloblist_next_blob(hdr, rec)) {
printf("%08lx %8x %3d %s\n",
(ulong)map_to_sysmem((void *)rec + rec->hdr_size),
rec->size, rec->tag, bloblist_tag_name(rec->tag));
}
}
int bloblist_init(void)
{
bool expected;

32
include/bloblist.h
View file

@ -19,6 +19,7 @@ enum {
BLOBLIST_ALIGN = 16,
};
/* Supported tags - add new ones to tag_name in bloblist.c */
enum bloblist_tag_t {
BLOBLISTT_NONE = 0,
@ -35,6 +36,8 @@ enum bloblist_tag_t {
BLOBLISTT_INTEL_VBT, /* Intel Video-BIOS table */
BLOBLISTT_TPM2_TCG_LOG, /* TPM v2 log space */
BLOBLISTT_TCPA_LOG, /* TPM log space */
BLOBLISTT_COUNT
};
/**
@ -206,6 +209,35 @@ int bloblist_check(ulong addr, uint size);
*/
int bloblist_finish(void);
/**
* bloblist_get_stats() - Get information about the bloblist
*
* This returns useful information about the bloblist
*/
void bloblist_get_stats(ulong *basep, ulong *sizep, ulong *allocedp);
/**
* bloblist_show_stats() - Show information about the bloblist
*
* This shows useful information about the bloblist on the console
*/
void bloblist_show_stats(void);
/**
* bloblist_show_list() - Show a list of blobs in the bloblist
*
* This shows a list of blobs, showing their address, size and tag.
*/
void bloblist_show_list(void);
/**
* bloblist_tag_name() - Get the name for a tag
*
* @tag: Tag to check
* @return name of tag, or "invalid" if an invalid tag is provided
*/
const char *bloblist_tag_name(enum bloblist_tag_t tag);
/**
* bloblist_init() - Init the bloblist system with a single bloblist
*

59
test/bloblist.c
View file

@ -7,6 +7,7 @@
#include <bloblist.h>
#include <log.h>
#include <mapmem.h>
#include <asm/state.h>
#include <test/suites.h>
#include <test/test.h>
#include <test/ut.h>
@ -231,9 +232,65 @@ static int bloblist_test_checksum(struct unit_test_state *uts)
return 0;
}
BLOBLIST_TEST(bloblist_test_checksum, 0);
/* Test the 'bloblist info' command */
static int bloblist_test_cmd_info(struct unit_test_state *uts)
{
struct sandbox_state *state = state_get_current();
struct bloblist_hdr *hdr;
char *data, *data2;
hdr = clear_bloblist();
ut_assertok(bloblist_new(TEST_ADDR, TEST_BLOBLIST_SIZE, 0));
data = bloblist_ensure(TEST_TAG, TEST_SIZE);
data2 = bloblist_ensure(TEST_TAG2, TEST_SIZE2);
console_record_reset_enable();
if (!state->show_test_output)
gd->flags |= GD_FLG_SILENT;
console_record_reset();
run_command("bloblist info", 0);
ut_assert_nextline("base: %x", map_to_sysmem(hdr));
ut_assert_nextline("size: 100 256 Bytes");
ut_assert_nextline("alloced: 70 112 Bytes");
ut_assert_nextline("free: 90 144 Bytes");
ut_assert_console_end();
gd->flags &= ~(GD_FLG_SILENT | GD_FLG_RECORD);
return 0;
}
BLOBLIST_TEST(bloblist_test_cmd_info, 0);
/* Test the 'bloblist list' command */
static int bloblist_test_cmd_list(struct unit_test_state *uts)
{
struct sandbox_state *state = state_get_current();
struct bloblist_hdr *hdr;
char *data, *data2;
hdr = clear_bloblist();
ut_assertok(bloblist_new(TEST_ADDR, TEST_BLOBLIST_SIZE, 0));
data = bloblist_ensure(TEST_TAG, TEST_SIZE);
data2 = bloblist_ensure(TEST_TAG2, TEST_SIZE2);
console_record_reset_enable();
if (!state->show_test_output)
gd->flags |= GD_FLG_SILENT;
console_record_reset();
run_command("bloblist list", 0);
ut_assert_nextline("Address Size Tag Name");
ut_assert_nextline("%08x %8x 1 EC host event", map_to_sysmem(data),
TEST_SIZE);
ut_assert_nextline("%08x %8x 2 SPL hand-off", map_to_sysmem(data2),
TEST_SIZE2);
ut_assert_console_end();
gd->flags &= ~(GD_FLG_SILENT | GD_FLG_RECORD);
return 0;
}
BLOBLIST_TEST(bloblist_test_cmd_list, 0);
int do_ut_bloblist(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{